Atualizando para o Rails 2.3.2

app/views/layouts/courses.html.haml

@@ -9,11 +9,10 @@
     - @title = @title + " - Disciplinas"
 
 - if @course and @course.id
--   @left_panel = render 'courses/_left_panel'
--   @right_panel = render 'courses/_right_panel'
+  - @left_panel = render 'courses/left_panel'
+  - @right_panel = render 'courses/right_panel'
 - else
--   @left_panel = render('widgets/menu_navigation') + render('widgets/menu_user')
-- end
+  - @left_panel = render('widgets/menu_navigation') + render('widgets/menu_user')
 
 - @content = yield